Hydrogeological Investigation

of the Lower Floridan Aquifer

in Polk County

Crooked Lake Site Update

Oct. 11, 2017 – Presentation to District’s Well

Drillers Advisory Committee

Agenda

• Central Florida Water Initiative (CFWI)

• Project Overview

• Crooked Lake Status

• Communications

• Status of Related Investigations

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Project Video: WaterMatters.org/LFA

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A collaborative

regional water

supply planning

effort to protect,

develop, conserve

and restore central

Florida’s water

resources

Central Florida Water Initiative

(CFWI)

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Project Overview

•Assess the viability of the LFA as an alternative

water supply source

• 3-year testing program in 2 phases

•Phase 1

– initial drilling and testing

– installation of multiple monitor wells

•Phase 2

- Drilling and testing of test/production wells

- Aquifer performance tests:

• Aquifer characteristics

• Water quality7

8Versa-Drill coring rig

Crooked Lake LFA Site Update

• Project start January 2017

• Upper Floridan aquifer (UFA) and surficial

aquifer (SA) wells completed

• LFA coring ongoing

– Coring

– Packer tests

– Water quality testing

– Geophysical logging

– USGS Optical Borehole Imaging and age

dating9

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Coring Bit

HQ Casing

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10 foot cores

Removal of core sample

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Dolomite with infill of gypsum and

organicslimestone

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Limestone with laminations/gypsum

Limestone with infill of gypsum and

anhydrite

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Porous dolomite

Crystalline dolomite & anhydite

SA and

UFA

monitor

wells

Storage of brackish

water

Disposal of

blended water

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SE Polk Production Zone

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Glauconite

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SE Polk Production Zone

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SE Polk Production Zone

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Target zone is the

LFA above MCU II

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Target zone is the

LFA below MCU II

The SE Polk

production zone

Target zone is the

LFA above MCU II

(below the GMU)

Next Steps at Crooked Lake

• Complete LFA monitor well (below

MCU I) with Huss Drilling

• Select contractor for construction of

LFA dual zone monitor well (below

MCU II)

– January 2018: Request for Bids

– Summer 2018: Start construction

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Communications

• Video released July 21, 2017

• LFA webpage July 25, 2017

– WaterMatters.org/LFA

• Future workshops

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QUESTIONS and COMMENTS

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